1)on pose a=1/2;b=-1/4;c=-5/3 calculer et simplifier sipossible:a+b+c ; a-b-c ; a-[2/3+(b-c)]
2)sachant que :2×x×y=-3
calculer=F=4x/5×5/3y.
vous pouvez m'aider svp. ​
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